I just started vaping 4 days ago. Went to the local head shop and bought my first set on monday. I bought a couple flavors caramel and roc sauce but am wanting to buy a few more today. When I was there I noticed they had a few flavors with caffeine added to them. I was wondering if anyone has tried juice with caffeine added and what your opinion is of it. I thought about buying one but not too sure about it. Any info would be helpful. Thanks